jehanne/sys/src/lib/bio/bvprint.c

49 lines
1.0 KiB
C

/*
* This file is part of the UCB release of Plan 9. It is subject to the license
* terms in the LICENSE file found in the top-level directory of this
* distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No
* part of the UCB release of Plan 9, including this file, may be copied,
* modified, propagated, or distributed except according to the terms contained
* in the LICENSE file.
*/
#include <u.h>
#include <lib9.h>
#include <bio.h>
static int
fmtBflush(Fmt *f)
{
Biobufhdr *bp;
bp = f->farg;
bp->ocount = (char*)f->to - (char*)f->stop;
if(Bflush(bp) < 0)
return 0;
f->stop = bp->ebuf;
f->to = (char*)f->stop + bp->ocount;
f->start = f->to;
return 1;
}
int
Bvprint(Biobufhdr *bp, char *fmt, va_list arg)
{
int n;
Fmt f;
f.runes = 0;
f.stop = bp->ebuf;
f.start = (char*)f.stop + bp->ocount;
f.to = f.start;
f.flush = fmtBflush;
f.farg = bp;
f.nfmt = 0;
//f.args = arg;
va_copy(f.args, arg);
n = dofmt(&f, fmt);
va_end(f.args);
bp->ocount = (char*)f.to - (char*)f.stop;
return n;
}